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Introduction of electric vehicle lithium-ion battery fault maintenance

① The battery cannot be charged

When the electricity cannot be charged, it can be divided into the following reasons: the charger is connected reverses or the charger fails; The protection board is not restored or the protection board fails; The battery pack and the external circuit of the electrical appliance are disconnected.

When dealing with the above undesirable phenomena, find out in turn: whether the charger is connected in reverse and whether the positive and negative plugs of the battery pack are connected in reverse; Restart the electrical appliance to remove the protection board and measure whether the protection board MOS tube has a driving voltage; Find out whether the wiring connection is loose and disconnected.

② Short mileage

When the battery pack is used, it is quickly discharged. The reasons for this situation are: the lithium ion battery is not fully charged; The voltage capacity difference of a single string is large; The micro-short circuit of the battery pack or the large self-discharge of the battery pack causes the battery pack to be consumed as soon as it is fully charged.

For the above defects, the battery pack can be recharged or the defective battery cell can be replaced.

③ Panel softening fault

The important performance is that the surface of the positive plate gradually softens from the beginning of the solid to the paste, and with the decrease of the surface area, the battery capacity will be reduced.

Repair method: discharge 10.5v after the bulb discharge 1-5 hours. Then there's the activator, activating the repair. In this way, it is possible to repair, but in the case of heavy ones, only new ones can be replaced.

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